2014年河南省玉米茎腐病大爆发,调查25个品种的发病情况。依据国家玉米品种抗病鉴定标准,浚单509为抗病品种;豫单606、金赛38和浚单3136为中抗病品种;其他21个品种均为高感品种。确定以5%的产量损失率为划分耐病性标准的临界值,耐茎腐病品种有浚单509、豫单606、金赛38、浚单3136、怀玉5288、桥玉8号、XY046、正玉10、黎乐66、伟科702和浚单29。品种的抗病性主要以病株率的高低作为划分依据,耐病性主要以产量损失率作为划分依据,以Venn图的形式展示品种的抗病性和耐病性之间的联系。

Due to the meteorological factors, Henan province had a large-scale outbreak of corn stalk rot in 2014, the morbidity of 25 varieties was investigated. According to the relevant resistance standards, Xundan509 was classified as resistant varieties. Yudan606, Jinsai38 and Xundan3136 were classified as medium resistant ones, while the other 21 samples were highly susceptible varieties. Using the yield loss rate of 5% as the critical value of disease tolerance standard, Xundan509, Yudan606, Jinsai38, Xundan3136, Huaiyu5288, Qiaoyu8, XY046, Zhengyu10, Lile66, Weike702 and Xundan29 were divided into tolerant varieties of Corn Stalk Rot. The concept be-tween disease resistance and disease tolerance was distinguished. And the rate of diseased plant as the basis of dis-ease resistance dividing, the yield loss rate as the evaluation standard of disease tolerance, the relationship between them was showed by using a Venn diagram.

公益性行业(气象)科研专项——黄淮海“永优”(浚单)玉米系列品种气候适应性关键技术研究(GYHY201406026）